Title:
RAW COPOLYESTER MATERIAL FOR AMORPHOUS FILM, HEAT-SHRINKABLE POLYESTER-BASED FILM, HEAT-SHRINKABLE LABEL, AND PACKAGE
Document Type and Number:
WIPO Patent Application WO/2018/147249
Kind Code:
A1
Abstract:
[Problem] To provide: a heat-shrinkable polyester film which has a high degree of width-direction heat shrinkage and a low degree of longitudinal-direction heat shrinkage and which changes little in the degree of shrinkage through aging; and a raw material for producing the heat-shrinkable polyester film.
[Solution] A raw copolyester material for amorphous films, characterized by satisfying the following requirements (1) to (4) and being for use in film production:
(1) to contain ethylene terephthalate as a main constituent component and contain neopentyl glycol in an amount of 18-30 mol% with respect to the total amount, which is taken as 100 mol%, of the glycol components among all the polyester resin components;
(2) to contain constituent units derived from diethylene glycol in amount of 8-16 mol% relative to the total amount, which is taken as 100 mol%, of the glycol components among all the polyester resin components:
(3) to have an intrinsic viscosity of 0.70-0.86 dl/g; and
(4) to have a melt viscosity, as measured at 250°C and a shear rate of 6080 /S, of 200 Pa∙S or less.
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| JP3460907 | POLYESTER FILM |
Inventors:
HARUTA MASAYUKI (JP)
ISHIMARU SHINTARO (JP)
OHASHI HIDETO (JP)
MINAMI SOICHIRO (JP)
ISHIMARU SHINTARO (JP)
OHASHI HIDETO (JP)
MINAMI SOICHIRO (JP)
Application Number:
PCT/JP2018/003924
Publication Date:
August 16, 2018
Filing Date:
February 06, 2018
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
C08G63/183; C08J5/18; G09F3/04; B65D25/20
Domestic Patent References:
| WO2008117842A1 | 2008-10-02 | |||
| WO2016083521A1 | 2016-06-02 |
Foreign References:
| JP2017177677A | 2017-10-05 | |||
| JP2004175937A | 2004-06-24 | |||
| JP2007083734A | 2007-04-05 | |||
| JP2007196679A | 2007-08-09 | |||
| JP2007152943A | 2007-06-21 | |||
| JPS644326A | 1989-01-09 | |||
| JP2007079280A | 2007-03-29 | |||
| JP2004058383A | 2004-02-26 | |||
| JPH0533895B2 | 1993-05-20 | |||
| JP4411556B2 | 2010-02-10 | |||
| JPS5249997B2 | 1977-12-21 |
Other References:
See also references of EP 3581604A4
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